package com.oea.servlets;

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import com.google.gson.Gson;
import com.oea.hibernate.entities.Faculty_Subject;
import com.oea.hibernate.entities.Schedule;
import com.oea.hibernate.entities.Subject;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.AbstractList;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 *
 * @author DELL
 */
public class ChangeTimetableAjaxAction extends HttpServlet {

    /**
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code>
     * methods.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        try (PrintWriter out = response.getWriter()) {
            Gson gson = new Gson();
            String id = request.getParameter("id");
            String days = id.substring(8, 9);
            int day = Integer.parseInt(days);

            String lecnos = id.substring(10, 11);
            int lecno = Integer.parseInt(lecnos);

            String fac_id = request.getParameter("fid");
            Long fid = Long.parseLong(fac_id);
            System.out.println("faculty id " + fid);
            
             String d_id = request.getParameter("divid");
            Long divid = Long.parseLong(d_id);
            System.out.println("division id " + fid);

            int count = 0;
            List<Schedule> schedule = Schedule.getSchedulesForSlot(day, lecno);
            for (Schedule s : schedule) {
                s.setDivision();
                while (fid == s.getFid()) {
                    count++;
                    break;
                }
            }
            if (count > 0) {
                String json = gson.toJson(null);
                out.println(json);
            } else {
                List<Faculty_Subject> subjects = Faculty_Subject.getSubjectsOfFacultyForDivision(fid,divid);
                for (Faculty_Subject f : subjects) {
                    System.out.println("subjects " + f.getSubid());
                    f.setSubject();

                    System.out.println("subjects " + f.getSubject().getName());

                }

                String json = gson.toJson(subjects);

                out.println(json);

            }
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /**
     * Handles the HTTP <code>GET</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Handles the HTTP <code>POST</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Returns a short description of the servlet.
     *
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>

}
